{
  "annotation_id": "ea214a71-530c-4c4a-8004-b72474a53d55",
  "date_created": "2026-03-02T18:02:09.878000Z",
  "date_modified": "2026-03-02T18:02:09.878000Z",
  "file_hash": "4bf6ef445fbbbcbb598d07c83948063c290fb5330748ffd5e7e124d4f03c18bd",
  "private": false,
  "record": {
    "abstract": "We describe a simple and efficient setup to generate and characterize\nfemtosecond quadrature-entangled pulses. Quantum correlations equivalent to\nabout 2.5 dB squeezing are efficiently and easily reached using the\nnon-degenerate parametric amplification of femtosecond pulses through a\nsingle-pass in a thin (0.1 mm) potassium niobate crystal. The entangled pulses\nare then individually sampled to characterize the non-separability and the\nentropy of formation of the states. The complete experiment is analysed in the\ntime-domain, from the pulsed source of quadrature entanglement to the\ntime-resolved homodyne detection. This particularity allows for applications in\nquantum communication protocols using continuous-variable entanglement.",
    "arxiv_id": "quant-ph/0409211",
    "authors": [
      "Jerome Wenger",
      "Alexei Ourjoumtsev",
      "Rosa Tualle-Brouri",
      "Philippe Grangier"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1140/epjd/e2004-00190-3",
    "journal_ref": "Eur. Phys. J. D 32, 391-396 (2005)",
    "title": "Time-resolved homodyne characterization of individual   quadrature-entangled pulses",
    "url": "https://arxiv.org/abs/quant-ph/0409211"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "21412c4e-8495-4df0-b93f-46d1df2e4d97",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}